Bobbin-winding machine.



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State of UNITED STATES PATENT oEEioE.

WILLIAM D. RUNDLETT, OF NORTH ANDOVER, MASSACHUSETTS, ASSIGNOR TO DAVIS &

FURBER MACHINE COMPANY, OF NORTH ANDOVER, MASSACHUSETTS, A

TION OF MASSACHUSETTS.

CORPORA- BOBBIN-WINDING MACHINE.

Specification of Letters Patent.

Patented Feb. 1s, 190s.

To all whom 'it may concern:

Be it known that I, WILLIAM D. RUND- LETT, a citizen 'of the United States, and resident of North Andover, county of Essex, Massachusetts, have invented an Improvement in Bobbin-Winding Machines, of which the following description, in connection with the accompanying drawing, is a speciication, like letters on the drawing representing like parts.

The machine to be herein d'escribed and constituting m invention is adapted to wind bobbins a ter the manner of the iilli wind wherein the yarn is laid in conica layers, each coil of each conical layer being of different length. It is well understood that said conical layers must be wound smoothly and snugly one on the other at uniform tension in order that the yarn may unwind from the bobbin while in a shuttle without tangling.

In my inventlon the yarn to be wound on the bobbins is taken from a spool containing an indefinite number of yarns, and each yarn is attached to a bobbin carried b a separate spindle, said spindles being revo ved at uniform speed.

It will be understood that when the spindles and bobbins are revolved at uniform speed and the yarn is laid thereon inconical coils varying in length circumferentially, that the arn to be wound on the bobbins must be elivered to the bobbins in var 'ng amounts at each revolution of the bolzloin during the winding of a conical layer, and the amount of yarn delivered for each coil of the layer will correspond with the circumference of the bobbin or yarn load where each individual coil is being laid.

The strain on the yarns taken from a spool and led to the bobbins is depended upon to rotate the spool, and should the yarn be led directly from the spool to the bobbins and wound thereon in conical layers as stated, it is obvious that the strain on the yarn would be so varied as to rotate the spool at variable rates of speed so that the inertia of the spool due to its mass will cause great additional strain to be exerted on the yarn while said yarns are being wound from a smaller diameter on the bobbin to a larger diameter, -and after the spool has reached its greatest velocity it delivers, .due to its momentum,

when the yarn is Wound more than desirable largest to its smallest on the bobbin from its diameter.

Up to the present time no means have been devised to produce sufficient tension on a spool to control its momentum that will not prove destructive to the yarn at some point of its delivery.

In accordance wlth my invention I have combined with a series of spindles and bobbinsrotated at uniform speed during winding of yarn thereon, and with a spool subjected to a uniform tension and moved by the yarn at a substantially uniform velocity, means for storing up yarn while the conical layer is being wound from its median line to its smaller end and back again to said median line, the yarn so stored up while winding substantially one-half of two conical layers being thereafter delivered to the bobbins while winding said conical layers from their median line to their larger ends and back again to said median line. In other words with relation to the spooll the surface speed of the s ool is equal to the surface speed of the bobbins when receiving the coil of yarn constituting the median line of each conical layer.

As I have herein chosen to illustrate and describe my invention I have mounted between the spindles `and' bobbins on one side and the spool su plying the yarn to the bobbins a movable evice that will act to supplement the usual winding strain and store up yarn while the halves of two conical layers are being wound, and deliver said stored up yarn to the bobbins as the lower halves of two conical layers are being wound.

The drawing represents in end elevation a sufficient portion of a winding frame, with my invention applied thereto.

Referring to the drawing, A represents part of one end of a winding frame having a top structure A mounted thereon, said top structure having a bearing A2 to receive a spindle or journal A3 extended from the barrel A4 of a spool havin if desired, usual headsAs, and between w ich on said body is wound a series of yarns a to be in turn rewound therefrom onto a series of bobbins B to be described.

The bobbins B are carried by mounted in usual bearings and spindles B represented tion the lever O3 as being driven by bands B2 from any usual drum B3, the drum being rotated at uniform speed and rotating the spindles in like manner. The yarn is shown as being wound on the bobbin in conical layers, each coil vof yarn surrounding the bobbin between the bottom and top of each layer varying in length.

That the yarn maykbe wound in conical layers, I have in the present instance of my invention adopted a faller Wire B'1 carried by an arm B5 connected with the shaft B, sustained in a suitable bearing B7 attached to the frame, said shaft having an arm B8 that is connected by arod B9 with a lever B1o having its fulcrum on a fixed stud B17, the o poslte end of said lever having a toe B13 tliiat rests on a feed cam B14 carried by shaft B15 mounted in'a slide B movable up and down together with the means for. rotating the feed cam' by means of a heart-cam C mounted on a shaft C havin fixed bearings in the framework, said shaft uniform speed by a train of gears connecting it with the drum B3, said heart-cam C acting on a roller C7 carried by a lever C3 having its fulcrum at C4 machine.

The shaft B17 carryin the feed cam B14 has a toothed wheel C5 t at is engaged by a worm Ce deriving its motion step-by-step through a pawl C7 mounted on a pawl-carrier C8 derivin its movement from a link C9 connected wit the crank pin on a disk carried by the shaft C', and an intermediate elbow lever C10 and link C17.

The shaft C is rotated, taking with it the heart-cam C, and rotating the same once during the winding of two conical layers of yarn, one from the larger diameter to the smaller, and the other from the smaller to the larger diameter, and during this operais raised, taking with it the slide carrying the feed cam B14 and its operatin .mechanism, Whichfas stated, is rotated slow y, so that the toe B13 held in contact with said cam through the arm B8 and rod B7 by a spring B14X may occu y, on the feed` cam, a different positlon eac time the faller wire B7 reaches its lowest'point, that is the faller wire at leach successive descent is left a little hi her than it was at the descent immediateiy preceding it, and the faller wire at each ascent goes up a little higher than it did at the ascent preceding. In this Way the conical layers are carried upon the body of the bobbin in usual manner.

4The means referred to for raising and lowering the faller Wire as described constitute what is designated as a builder-motion, and instead of the particular builder motion herein partially outlined, I may employ any other usual or suitable builder-motion that willmove. the faller u and down at the required speed and for t 'e required distances.

eing moved at` and xed in the framing oftended arm D7 on which is adjustablyclam ed a weight D3, said wei ht causing theipa to bear on the surface of the yarn whatever its diameter. 7

To maintain the friction device, Weight lever, and Weight in their inoperative position when supplying a spool, ,have jointed to the weight lever at D7 a link Dt1 having at its lower end a projection D7 that when the link islifted may engage a hook D8 of a catch pivoted at D".

The upper structure A has suitable bearings to right arms E shaped at' their upper ends to receive and hold a bar E7 rovided with a series of guide eyes E3, one or each yarn led from the spool to the diiferent bobbins. The shaft E is a rock-shaft, and it has an arm E* to which is jointed a rod E5 represented as embracing at its lower end acrank pin E carried by a gear E7 fast on the shaft C carrying the heart cam and driven from the drumshaft Bax, so that said rock-shaft controlled by said crank has given to it a variable motion that moves the bar E7 at different speeds during its stroke from one. to its other extreme.

The rock-shaft E has lsuitable arms EB that sustain a second bar E9 in turn provided with a series of yarn-guiding eyes E1", the yarnaled from the spool through the eyes E3 being also led through the eyes E10 on their way to the bobbins., and the eyes E10 are so located with relation to the longitudinal axis of the shaft E that they produce in their movement little or no variation in the length of yarn extended between the eyes E1o and the bobbins.

The drawing in full lines shows the bar E7 and thread-eyes E3 in the position they will occupy when the yarn is laid upon the bobbin at the bottom of the 'conical coil, the yarn being about to be wound onto the larger end of the coil, and thence upwardly towards the median line of the coil.

It will be understood that the surface velocity of the s ool is that requisite to provide yarn for t e coil of the conical layer which is substantially midway the lengthof the layer, and that during the operation of windin each conical layer, thread must be drawn om the spool and so maintained by the bar E7 and its connections, that when the windin is taking place from the median line 2 of t e yarn'cone on the bobbin to its point of smallest diameter, and back a ain to the median line, the yarn must be ta en up and retained bythe bar E7, and when winding fromthe median lineof the arr.- cone to its point of lar est diameter and ack again tothe median ine the yarn so taken receive a shaft E having suitable upposition the spool velocity back stroke into the wind, and while t the top or smaller layer to its median lineA up must be delivered to the bobbin. In this way it is possible to control the delivery of yarn exactly to the requirements of the length of each particular coil constituting each conical layer, and at the same time deliver the yarn under the same tension, the yarn being drawn from the spool by the combined action of bar E3 and bobbin strain at a uniform rate corresponding with the requirements of the median coil.

Viewing the drawing, it will be supposed that the series of guide-eyes E3 stood at the 2, dotted lines, when the faller wire B4 stood in the dotted or median line position 2', and while winding from the median line 2 down to the position shown by full lines in the drawing where the yarnl cone is of greatest diameter, the bar E2 was moved in the direction of the arrow into its full line position, and during such movement it gave up the thread, which was supported. by it,

to the increasing length of coils, and this delivery must continue until the yarn is led up the next layer to the median line, Aand consequently the bar E2 will complete its osition 3, shown by dotted lines, as the fal er wire B4 rises from itsl lowest position shown by full lines to the median line position 2. Now when winding from the median line position 2 upwardly along the yarn cone to the smallest diameter,- the bar E2 will be started from the position 3 and moved gradually to the left, it arriving in its'full line position substantially as the yarnreaches the upper end of the conical layer, thus taking up and pulling additional yarn from the spool and keeping constant, said additional yarn not being re uired in this part of the e wind is reversed from thel bar E2 is moved from its full line position into the position 2. -I

It may be explained that all portions of the yarn cone lying above the median line 2 are of smaller diameter than the average or median diameter 2 so that the take-up bar E2 must supplement the action of the bobbin in drawing yarn from the spool both on the upward and downward movement of the .winding wire, and the reverse is true of that part of the cone lying below the average or median line 2 during the winding of which both in the upward as well as the downward movement of the wire, the yarn stored by the take up must be delivered.

The pull on the yarn to move the spool is due clnefly to the rotation of the bobbins i` and spindles augmented by the movement of the bar E2, the two coacting in such manner as tov maintain substantially the same length -of'yarn between the thread eyes E3 and the bobbin, the length of thread, however, varying between the bar E2 and the spool.

I believe that I am the first to combine with a spool carrying one or more yarns and one or more spindles moved atta uniform velocity and carrying conical ended bobbins, of any means whatever for taking up and delivering the yarn at intervals between the spool and bobbins as the length of coils in the conical .layers demand during the winding operation, and I desire to claim this feature broadly irrespective of the particular construction of the means for varying the length of yarn between the spool and bob- -bin at intervals during the formation of each conical layer, as for instance" substantially the same effect might be accomplished by moving the spool toward and away from the longitudinal axis of the bobbin during the winding of each conicallayer, but this construction would require'more complex mechanism to control it than the particular means herein described. And so also it would be understood that the same result might be accomplished by moving the spindles ando their bearings to and fro which would neces'- sitate a more complex structure, one suitable to move thel spindles and the driving mechanism with it.

Having described my invention what I claim as new and desire to secureby Letters Patent is x- 1. In a winding machine, a spindle to carry a bobbin, means to rotate the spindle at a uniform speed, a yarn carrying spool moved at substantially uniform surface velocity by the yarn being wound, and means to increase and then diminish the length of yarn extended from the spool to the bobbin as demanded by the var ing diameter of the yarn load being woun on the bobbin.

2. In' a winding machine, a spindle to carry a bobbin, means to rotate the spindle at a uniform speed, a yarn carrying s ool, a constant tension device for said spoo said spool being rotated at a substantially uniform surface velocity by the yarn being wound, and means to increase and then diminish the length of yarn extended from the spool to the bobbin as demanded b the varying diameter of the lyarn load eing wound on the bobbin.

In testimony whereof, I have signed my name to this specification, in the presence of two subscribing witnesses.

WILLIAM D. RUNDLETT'.

Witnesses GEO. W. GREGORY, MARGARET A. DUNN. 

